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J. R. MERRIHEW.

COFFEE HULLER. No. 337,691. Patented Mar. 9, 1886.

2 Sheets-Sheet 1.

WiTNESS s: v INVENTU C M (No Model.) 2 Sheets--Sheet 2..

' J. R. MERRIHEW;

COFFEE HULLER.

Patented Mar. 9.1886;

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WiTNESSl-IS:

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UNTTE STATES JOSEPH R. MERRIHEW', OF NEWV YORK, N. Y.

COFFEE HULLER.

SPECIFICATION forming part of Letters Patent No. 337,691, dated March 9, 1886.

Application filed May 4, 1885. Serial No. Iii-1,402.

To all whom it may concern:

Be it known that I, J osnrn R. llIERRIHEW, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Ooffee-Hullers, of which the following is a specification.

This invention has for its object to provide certain improvements in coffee-hullers, and more particularly in the hulling mechanism therefor, whereby the hulling operation is rendered more efficient and satisfactory, and the durability of the hulling devices is increased.

To these ends my invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents an end elevation of a machine embodying my invention. Fig. 2 represents atransverse vertical section of the same. Fig. 3 represents a perspective view of one of the rubbers or strip pers.

It will be understood that the feeding devices form'no part of the present invention, but are only herein illustrated and described as showing a convenient arrangement to be employed in connection with the improvements.

The same letters of reference indicate the same parts in all the figures.

In the drawings, A represents the supporting-frame of a coffee-huller, having bearings for the arbor B of the serrated hulling-cylinder 0 and for the driving-shaft D, which is geared to and rotates said arbor and cylinder.

E E E represent a series of rubbers or strippers, which co-operate with the cylinder in hulling the coffee-berries, and have certain peculiarities of construction, hereinafter described.

frepresents the hopper, from which the berries are supplied to the cylinder and strippers. I provide in the lower portion of the hopper a feed-roll, I, which is belted to a pulley on the arbor of the cylinder 0, as shown in dotted lines in Fig. 2, and is rotated thereby. Over the feed-roll I is located a horizontal toothed plate or comb, J, having teeth sepa rated by slots or spaces of snfficient width to permit coffee-berries to pass easily between said teeth. The comb J is attached to a horizontal slide or bar, K, that is adapted to be (No model.)

reciprocated longitudinally in line with the roll I, and is moved first in one direction and then in the opposite direction by two cams, L L, projecting from opposite sides of a disk, M, attached to the arbor of the roll I, said cams acting alternately 011 lugs or fingers N N, projecting from the bar K. The acting surface or periphery of the cylinder 0 is composed of a series of serrated plates, 3, bolted to the body of the cylinder, each plate being detachable, so that it can be readily renewed or repaired. The rubbers or strippers E are short and narrow plates or arms arranged in several series or rows on rods or pivots t, which are secured to a concave or casing, u, and are substantially parallel with the axis of the cylinder. A number of strippers are placed on each rod, each stripper being adapted to oscillate on its rod independently of the others. Each stripper is provided on its inner side with a serrated plate, 2, of chilled steel, having independent pyramidal teeth, as shown in Fig. 3. Said plate is fitted to a seat or recess on the stripper-arm, and is secured to the latter by a central screw, 3, arranged so that the plate 2 can be removed, reversed, and again attached to the arm E by the same screw, thus enabling the end of the serrated plate which is nearest the pivot to be placed nearest the outer end of the stripper-arm in position to cooperate with the cylinder in hulling, the part nearest the pivot being too far from the cylinder to act with any force on the coffeeberries, but simply serving to guide the berries to the acting portion of the plate. Thus all portions of the serrated surface of the plate can be utilized for hulling.

Against the outer ends of the stripper-arms bear springs 20, which are preferably rubber blocks, although they may be of spiral wire, if preferred. Said springs are supported against outward pressure by flanged metal plates or holders a. Said holders extend across the concave, and are supported at their ends by screw-bolts b, passing through tapped sockets in the concave, and having reduced smooth surfaced ends entering sockets in the holders. Said bolts enable the holders a to be moved toward or from the concave, so as to decrease or increase the pressure of the springs to on the strippers. The strippers are thus permitted to approach the cylinder as nearly as may be desirable, to enable them to act on the smallest berries, but are prevented from actual contact with the cylinder by screws 8, passing through the concave, and bearing against shorter arms or lugs at the rear ends of the strippers, said screws holding the longer arms of the strippers against thesprings. The springs to constitute yielding backings for the strippers, and cause them to exert a yielding pressure on the coffee-berries passing between the cylinder and the strippers. Said pressure is regulated by the holders to and the above-described means for adjusting said holders, and thus the strippers are adapted to coffee'berries requiring different degrees of pressure. The concave u is pivoted at its lower end to'the frame A at d, and bears at its upper end against the hopper for other fixed part of the frame.

6 represents a rod journaled at one end in a bearing, f, secured to the frame, and having its opposite end threaded and screwed into a socket, g, whichis pivoted to the concave.

The concave and its strippers may be adjusted toward or from the cylinder by rotating the rod 0, which is provided with a handwheel, h, for this purpose. Thus a simultaneous adjustment of all the strippers may be effected. The upper end of the concave is preferably provided with a lug, j, in which works a threaded bolt, is, adapted to bear against the side of the hopper and constitute an adjustable stop, which limits the movements of the concave toward the cylinder.

It will be seen that the improved liulling mechanism is simple, durable, and effective, and admits of a considerable variety of adjustment.

sides of the pivots, substantially as and for the purpose set forth.

. 2. The combination of the cylinder 0, concave a, serrated strippers pivoted in the concave, adj Listing-screws 8, bearing upon the upper ends of the strippers, and yielding adjustingscrews b a w, bearing upon the lower ends of the strippers, as and for the purpose,

set forth.

3. The combination, with the toothed cylinder, of the strippers pivoted in tangential relation with the cylinder, comprising the arms E and serrated plates 2, detachably secured to said arms and adapted to be reversed to bring different portions of their surfaces into stripping action, as set forth.

4. The combination of the toothed cylinder, the pivoted concave, the strippers pivoted to said concave, and the rod 6', .for adjusting the concave and its strippers, as set forth.

In testimony whereof lhave signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH R. MERRIHEW.

Witnesses:

O. A. ECHMAN, ISAAC J ONES. 

